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A147637
as a simple table
n
a(n)
1
9
2
98
3
984
4
9876
5
98720
6
987540
7
9864120
8
98765120
9
876351240
10
9876351240
[9,98,984,9876,98720,987540,9864120,98765120, 876351240,9876351240]